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2 Sheets-Sheet 1.

(No Model.)

J. E. BARRY;

HYDRAULIC ELEVATOR.

No. 473,811. Patented Apr. 26, 1892.

2 Sheets-Sheet 2.

(No Model.\

J. E BARRY.

HYDRAULIC ELEVATOR.

No. 473,811. Patented Apr. 26, 1892.

I \mg mwwfl 111:;

UNITED STATES PATENT OFFICE.

JOSEPH E. BARRY, OF NEWV YORK, N. Y.

HYDRAU LIC ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 473,81 1, dated April26, 1892. Original application filed April 10, 1891, $erial No. 388,410.Divided and this application filed August 5, 1891. Serial No.

To aZZ whom it may concern Be it known that I, JOSEPH E. BARRY, of thecity, county, and State of New York, have invented a new and" usefulImprovement in Ilydraulic Elevators, of which the following is aspecification.

My invention relates to elevators which are operated by means of apiston passing up and down through a long cylinder under the pressure ofwater, the different operations being effected by the movements of avalve-rod, with several disks upon it, operating in an operatin g-valvewhich is connected with the top and bottom of the water-cylinder. Thefault connected with such hydraulic elevators not heretofore overcomehas been the scraping or sawmg noise heard at the stopping and startingof the elevator during its ascent. The cause of this noise is thedischarge of the water under high pressure through the narrow openmg atsome one of the ports of the operatingvalve as the edge of the disk onthe valve-rod passes such port. The noise occurs just after the elevatorstarts in ascending and just before it stops in ascending-that is, whilethe port through which the water is passing under high pressure isthrortled. It is not feasible to operate a valve-rod quickly enough toprevent this noise.

My invention claimed. herein is a form or development of a generalinvention described and claimed in an application heretofore made by me,being Serial No. 388,410, filed April 10, 1891, and of which applicationthis present application is a division.

Its specific object is the application of such general invention to thecommon form of operating-valves now in use, so as to avoid the necessityof new operating-valves for plants already established.

Itconsists, in general, of the combination, with such operating-valve,of another valve or cook working in connection with such operating-valveand controlling through the main Water-pressure the opening and closingof the valve in the discharge-pipe. By this means the point at which thenoise is caused is removed from the operating-valve to the valve in thedischarge-pipe, and so may be placed at any convenient point in thebuilding where it will not cause annoyance, and

(No model.)

also by this means the noise may be greatly lessened by the form ofvalve to be used in' the discharge-pipe.

In the accompanying drawings, in which the same characters indicateanalogous parts, Figure 1 represents the apparatus complete with all theparts in the positions assumed while the elevator is at rest. Fig. 2shows the position of the operating-valve and of the additional valvewhen the piston is ascending and the elevator descending, and Fig. 3their position when the piston is descending and the elevator ascending.

B is an ordinary water-cylinder full of water and connected through pipeD to a tank on the roof or other Water-supply under pressure and havingwithin it a piston and pistonrod attached to one end of a rope, theother end of which supports the elevator, so that as the piston descendsthe elevator ascends and as the piston ascends the elevator descends.The pipe D, open both to the upper part of the water-cylinder B and tothe inlet-pipe D, opens into the operating-valve A. The pipe D connectsthe bottom of the water-cylinder B and the operat-ingvalve A. Pipe M isthe discharge-pipe and is open to the bottom of the operating-valve A.This pipe M passes into the discharge-tank E and has a valve H situatedin it to be operated by the main water-pressure. The valve H may beplaced at any other convenient point in the discharge pipe, the objectbeing to remove it from any place Where the noise would cause annoyance.

In the drawings the valve H is shown as operated by a flexiblediaphragm, the operation being such that when the pressure of the wateris open through the pipe 70 underneath the diaphragm the water pressesthe diaphragm and the valve H attached to it upward and thus opens thevalve I-I, so that the Water may be discharged from the water-cylinder Binto the tank E. Vhen the waterpressure is relieved underneath thediaphragm of the valve H the elasticity of the diaphragm causes thevalve H to close. Other forms of valves to be operated by thewater-pressure will easily suggest themselves in place of the valve H.

The valve A is operated by the operator in the elevator through thewheel L moving the rod F, to which are affixed three disks 7', 1c, andZ, moving in the operating-valve A. This is the ordinaryoperating-valve.

To apply my invention, I add an additional valve K, also operated by theoperators wheel L, and the valve H, operated by the main water-pressurethrough the additional valve K. A rod m is pivoted to some fixed point nand has its free end resting upon the hub 29 10 of the operators wheelL. A pin 0 is fixed eccentrically upon the operators Wheel L and raisesthe rod we when the elevator is ascending, Fig. 3. 'The rod m isconnected by the connecting-rod s to the two disks i and t- The valve Kis a small within the valve K.

cylinder having three openings to the pipes 10, 70 and k Of these pipes70 leads to the .water-supply, so as to be always under pressureforexample, to pipe D. 70 leads under- 2o neath the diaphragm of valve H,and 70' leads to the top of the tank E or to any other convenient point,its object being merely to make an opening from the upper part of thevalve K.

The apparatus operates in the following manner: WVhen the elevator is tobe made to ascend, the valve-rod F and the pistons 7', 7c, and Z in theoperating-valve A are placed in thevposition shownin Fig. 8. In suchposition the pressure of the water from the tank or other source ofsupply is open through the pipe D,

thepipe 703, the valve K, and the pipe 70 underneath the diaphragm ofthe valve II. The water-pressure thus raises the valve H in thedischarge-pipe, and the water then discharges through the pipe D theoperating-valve A, and the pipe M from below the piston in thewater-cylinder B, and this causes the elevator to ascend. Then themotion is to be stopped, the parts are placed in the position shown inin Fig. 1. In such position there is no outlet for the water underneaththe piston in the water-cylinder B, and-therefore the piston and theelevator stop. The pressure of the Water is also shut ott from the pipeand is relieved 5 through the pipe 70', so that the valve II also closesthe outlet from the discharge-pipe M.

When the elevator is to be made to descend, the parts are placed in theposition of Fig. 2. In such position the water has free circulationthrough the pipes D and D and the operating-valve A, and the elevatordescends by gravity. In such position the valve K and the valve H are inthe same position as that of .Fig. 1, no water being discharged from thedischarge-pipe M.

Figs. 2 and 3 represent the extreme movements of the operating-wheel L,the former the position of descent and the latter of ascent of theelevator. In changing from the position of Fig. 2 to that of Fig. 1, orviceversa, the pin 0' passes around the end of the rod m, and hence thedisks tand t in the valve K do not move. Other devicese. g., a three-waycockinay be substituted for the valve K to accomplish the purpose. 'Thedisks andpistons within the valve K and within the operating-valve A andother different connections should be so placed with reference to eachother that the pressure should not be open through the pipe 70 so as toraise the valve I-I until the disk Zin the operating-valveA has opened apassage from the pipe D into the operating-valve A Widely enough toprevent the noise occurring there.

I claim as my invention- I11 hydraulic elevators, the combination of anoperating-valve, a separatepositively-op erated valve in thedischarge-pipe, a pipe leading from such valve in the discharge-pipe tothe water-pressure, and another valve or-cock operating in connectionwith the operatingvalve, through which the valve in the discharge-pipeis operated by the main waterpressure.

In witness whereof I have hereunto set my name this 28th day of July,1891, in the pres ence of two witnesses.

JOSEPH E. BARRY. lVitnesses:

SALTER S. CLARK, ARTHUR E. WALRADT.

